Carburetor



March 24, 1953 .A. H. CARSON CARBURETOR Filed April 19, 1951 ISnnentor,,QSO/Y Gttorneg Patented Mar. 24, 1953 UNITED STATES PATENT OFFICE iCARBURETOR Andrew H. Carson, Los Angeles, Calif.

Application April 19, 1951, Serial No. 221,826

Claims. (Cl. 26h-41) The present invention relates to carburetors withinthe carburetor. The present invention dispenses with the use of such aiioat and is so `constructed and arranged as to properly meter the iiowof gasoline and regardless of inclination to horizontal assumed by thecarburetor.l

The invention incorporates many novel fea` tures of construction1 whichreduce the numberof working parts, renders the carburetor substantiallyfool-proof in operation, is capable of functioning efficiently atdifferent motor speeds, and

which maintains Icorrect air to fuel ratio for all l engine speeds.

`The inventor has found, in actual practice, that the carburetor of thepresent invention is easily adjusted for different piston displacementso that the carburetor Works for all motor speeds without any .flatspots. ther fo-und that the carburetor conserves fuel and is economi-calto operate, in that it is saving in its use of gasoline, or othercombustible fuel.

Other objects include a carburetor which is superior to carburetors nowknown to the inventor, economical in cost of manufacture, and easilyinstalled.

With the above mentioned and other objects in view, the inventionconsists in the novel and useful provision, formation, construction,association, and relative arrangement of parts, members and features,all as shown in a certain embodiment in the accompanying drawing,described generally, and more particularly pointed out in the claims. Inthe drawing:

Figure 1 is a fragmentary, partially sectional side Ielevation of thecarburetor shown attached scale, taken on the line 3-3 of Figure 2.

Referring lnow with particularity to the drawing, the improvedcarburetor includes a carburetor casing I, which is open at its top 2,to provide an air intake, the opposite end of said casing being securedto member 3, which member isv of reduced internal diameter from theinternal diameter of the casing I, and provides a fuel passageway at 4and an emulsified fuel outlet at 5. f The upper end of memberv 3 isflanged at VIi for "reception within, the 4lower end of Acasing I, ,and

The inventor has fursecured thereto by means 1, such as screws. Theintake throat lIl may be beveled as shown, or said. member 3 may be inthe form of a Venturi tube. However, in the present instance, theinternal diameter of said member 3 is uniform, with the exception of thethroat 8. Member 3 is provided with -diametrically disposed hubs 9 andIII, for purposes hereinafter designated, and the lower end of member 3vis flanged at II for connection with the intake manifold I2, shown infragment, of an internal combustion engine.

Within the casing I is a metering valve means which includes a tube orcasing I3, threaded at its upper end to a gland nut I4, the nut havingan enlarged bore at I5 to receive packing held in place by a nut I6. Theopposite end of said tube I3 is threaded to a plug Il, provided withmetering ports. In particular, plug I'I is formed with an axial bore I8,which communicates with a counterbore I9. Two eccentric bores 20 and 2lextend from the top of the plug longitudinally thereof, with small portsof different diameters spaced between the bores I8 and 20, and I8 and2l, respectively, as shown at 22 and 23. It will be observed that ports22 and 23 are in staggered relationship. In other words, the lowermostport of the type 22 is staggered with relation to the lowermost port 23,and so on. Furthermore, as stated, the lowermost port 22 is of smallerdiameter than the next ascending port 22, and the same is true for theports 23. The ports of the type shown at 22 and 23 gradually increase indiameter from the lowermost port to the topmost port.

Adapted to extend longitudinally of the tubing I3 is a, valve stem 24',which stem is received in the bore I8 and extends centrally of the glandnut I4 passing through packing I5, the packing nut IB, and outwardlybeyond said nut.

A tube 25 has one end thereof received within the counterbore I9 andheld to the plug I'l in any convenient manner, such as by brazing,welding, or otherwise, the said tube being bent so as to have the outletorifice 26 positioned on the axis of member 3. The tube 25 carries aconical member 2l, the apex of the cone being adjacent the orice 26, thesaid cone being supported by said tube 25 by means of a connecting strip28.

Below the cone 21 is a throttle valve 29, compristened one end of a link32, the opposite end of thelink being secured to a rod 33 passed throughexternal guides 34 and 35 mounted on the casing I, there being aconnecting piece 36 adjustably secured between the rod 33 and the stem24. The opposite end of the shaft 30 carries an arm 3l, to which isconnected a link 38, which link is controlled as to movement to in turnmove the arm 3l by the usual foot controlled lever or hand lever usuallymounted adjacent the steering wheel of the vehicle.

The tubing I3 is externally provided with enlargements 39 yand 40, thesaid enlargements being provided with reduced diameter and screwthreadedportions 4I and 42, which threaded portions are passed through openingsin the side wall of the casing I, and to which nuts 43 and 44 arethreaded. The enlargements are formed with central ports or bores 45 and46. A `pipe or tubing 41 is secured by the nut 43, to the end that saidtubing has communication with the bore 45, the tubing leading to a fuelpressure pump (not shown), for supplying fuel. under pressure, to ll thewell or space 48, which is included between nut I4, plug Il, and theinterior of the tube I3, as Well as lling the ports 20, 2| and theconnecting ports .22 and 23. The nut 44 secures a tubing 49, whichtubing leads to a needle valve 50 communicating with the interior ofmember 3 below the throttle valve 29. The upper end of tubing 49 is 1ncommunication with the port or bore 45, and is the well or space 48continuously filled with gasoline. When the throttle is operated fromthe substantially horizontal position shown in Figure 2, to raise rod33, the stem 24 is elevated so that any gasoline Within ports 2B and 2iwill be ready to flow from the lowermost ports 22 Aand 23 into thecentral port 0r bore I8 b6- neath the end of said stem and thence intotube 25 vfor deposit on the outer surface 0f cone 2l. Suction whichexists in the engine draws air through the casing and through member 3to pick up the gasoline on the cone and admix or f emulsify the same fordelivery through the intake manifold to selected cylinders of theengine. Thus, as the stem 24 is raised, more and more of the staggeredarranged ports 22 and 23 are uncovered to allow more gasoline to passthrough tube 25 for deposit on the surface of lthe cone 21. The size ofthe ports 2B and 2i With relation to the ports 22 and 23 is such as toprovide an increasing amount of gasoline ow into the tube 25. This, ofcourse, is necessary for obvious reasons.

In view of the fact that the pump pressure maintains the well or space48 constantly filled with gasoline, it is evident that the carburetorwill deposit gasoline onto the surface of the cone A21, regardless ofthe inclination f the axis of the carburetor to the horizontal. In otherwords, the liquid under pressure is forced through ports 2|) and 2l, andthe transverse ports 22 and 23 at all times during pump operation andoperation of the motor. It is be- 'cause of the existence of the well orspace 44 that a float bowl with a oat therein is rendered unnecessary.

It is obvious that various changes may be made in the relationship ofthe various elements entering into the invention, the drawing beingillustrative of one embodiment.

I claim:

l. In a carburetor, a fuel metering device comprising a casing closed.at one end, a metering 'valve body in `the opposite end ofthe casing,the space included between the metermer valve body and said closed endforming a well adapted to receive a combustible fuel, said meteringvalve body provided with an axial bore, a valve stem movable within thesaid axial bore, a series of transverse ports communicating with theaxial bore and with the well, any combustible fuel in said well passingsequentially through the transverse ports and into the axial bore.consequent upon opening said ports by movement of the said valve stemin one direction.

2. A carburetor casing open at both ends, one Vend providing an airintake portion, and the opposite end for attachment to the intakemanifold of an internal combustion engine, and a throttle valvecontrolling passage of air through the 'carburetor casing, thecombinati-on therewith of: a metering valve means for combustible fuelpositioned within the carburetor casing between the air intake and thethrottle valve; said metering valve means including a valve casina", a'valve body secured to the valve casing at one end thereof, a gland nutat the opposite end of the valve casing, the space included between saidgland nut and said valve body providing a well for combustible fuel,said gland nut and said valve casing each provided with an axial boreand a stem extending through the valve casing the said axial bores ofthe gland nut and valve body; said valve body provided with a pair ofspaced parallel longitudinally extending eccentric bores, and said valvebody provided with spaced transverse ports extending between said4eccentric bores and the axial bore thereof, the eccentric bores adaptedto receive fuel from the well for passage into the transverse ports whenthe stem is raised to uncover said ports and permit the combustible fuelto flow into the axial bore of said valve body.

3. A carburetor casing open at both ends, one end providing an airintake portion, and the V'opposite end for attachment to the intakemanifold of an internal combustion engine, and a throttle valvecontrolling passage of air through vthe carburetor casing, thecombination therewith of: a metering valve means for combustible fuelpositioned within the carburetor casing between the air intake and thethrottle valve; said metering valve means including a valve casing, avalve body secured to the valve casing at one end thereof, a gland nutat the opposite end of the valve casing, the space included between saidgland nut and said valve body providing a well for combustible fuel,said gland nut and said valve casing each provided with an axial boreand a stem extending through the valve casing and said axial bores ofthe eters, raising the stern progressively uncoveringports of largerdiameter.

4. A carburetor casing open at both ends, one

` end providing an air intake portion, and the opposite end forattachment to the intake manifold o1 an internal combustion engine, anda throttle valve controlling passage of air through the carburetorcasing, the combination therewith of: a metering valve means forcombustible fuel positioned within the carburetor casing between the airintake and the throttle valve; said metering valve means including avalve casing, a valve body secured to the valve casing at one endthereof, a gland nut at the opposite end of the valve casing, the spaceincluded between said gland nut and said valve body rroviding a well forcombustible fuel, said. giand nut and said valve casing each providedwith an axial bore and a stem extending through the valve casing andsaid axial bores of the gland nut and the valve body; said valve bodyprovided with a pair of spaced parallel longitudinally extendingeccentric bores, and said valve body provided with spaced transverseports extending between said eccentric bores and the axial bore thereof,the eccentric bores adapted to receive fuel from the well for passageinto the transverse ports when the stem is raised to uncover said portsand permit the combustible fuel to flow into the axial bore of saidvalve body, a tube in communication with the axial bore in said valvebody for conducting combustible fuel therefrom, and an ilnperforateconical member, having its apex centered with respect to the outlet endof said tube for passing Y fuel positioned within the carburetor casingbetween the air intake and the throttle valve; said metering valve meansincluding a valve casing, a valve body secured to the valve casing atone end thereof, a gland nut at the opposite end of the valve casing,the space included between said gland nut and said valve bodyr providinga Well for combustible fuel, said gland nut and said valve casing eachprovided with an axial bore and a stem extending through the valvecasing and said axial bores of the gland nut and valve body; said valvebody provided with a pair of spaced parallel longitudinally extendingeccentric bores, and said valve body provided with spaced transverseports extending between said eccentric boresfk and the axial borethereof, the eccentric bores adapted to receive fuel from the well forpassage into the transverse ports when the stem is raised to uncoversaid ports and permit the combustible fuel to fiow into the axial boreof said valve body; a tube in communication with the axial bore in saidvalve body for conducting combustible fuel therefrom; an iinperforateconical member positioned on one side of the throttle valve and havingits apex centered with respect to the outlet end of said tube forpassing combustible fuel over the surface thereof, and a valvedconnection between the Well of the metering valve means and thecarburetor casing on the opposite side of said throttle valve.

ANDREW H. CARSON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,220,965 Duvall Mar. 27, 19171,376,156 Murphy Apr. 26, 1921 1,606,491 Abernethy et al Nov. 9, 19261,929,234 Anderson Oct. 3, 1933 2,102,504 Beardsley et al. Dec. 14, 19372,198,676 Mallory Apr. 30, 1940 2.576,196 Stanalis Nov. 27, 1951

